diff --git a/acceptance/testdata/runnerset.envsubst.yaml b/acceptance/testdata/runnerset.envsubst.yaml
index 8a1edcdd..1809f483 100644
--- a/acceptance/testdata/runnerset.envsubst.yaml
+++ b/acceptance/testdata/runnerset.envsubst.yaml
@@ -122,8 +122,10 @@ spec:
           value: "/home/runner/.cache/go-mod"
         # PV-backed runner work dir
         volumeMounts:
-        - name: work
-          mountPath: /runner/_work
+        # Comment out the ephemeral work volume if you're going to test the kubernetes container mode
+        # The volume and mount with the same names will be created by workVolumeClaimTemplate and the kubernetes container mode support.
+        # - name: work
+        #   mountPath: /runner/_work
         # Cache docker image layers, in case dockerdWithinRunnerContainer=true
         - name: var-lib-docker
           mountPath: /var/lib/docker
@@ -163,17 +165,18 @@ spec:
         # For buildx cache
         - name: cache
           mountPath: "/home/runner/.cache"
-      volumes:
-      - name: work
-        ephemeral:
-          volumeClaimTemplate:
-            spec:
-              accessModes:
-              - ReadWriteOnce
-              storageClassName: "${NAME}-runner-work-dir"
-              resources:
-                requests:
-                  storage: 10Gi
+        # Comment out the ephemeral work volume if you're going to test the kubernetes container mode
+      # volumes:
+      # - name: work
+      #   ephemeral:
+      #     volumeClaimTemplate:
+      #       spec:
+      #         accessModes:
+      #         - ReadWriteOnce
+      #         storageClassName: "${NAME}-runner-work-dir"
+      #         resources:
+      #           requests:
+      #             storage: 10Gi
   volumeClaimTemplates:
   - metadata:
       name: vol1
@@ -251,3 +254,10 @@ spec:
   minReplicas: ${RUNNER_MIN_REPLICAS}
   maxReplicas: 10
   scaleDownDelaySecondsAfterScaleOut: ${RUNNER_SCALE_DOWN_DELAY_SECONDS_AFTER_SCALE_OUT}
+  # Comment out the whole metrics if you'd like to solely test webhook-based scaling
+  metrics:
+  - type: PercentageRunnersBusy
+    scaleUpThreshold: '0.75'
+    scaleDownThreshold: '0.25'
+    scaleUpFactor: '2'
+    scaleDownFactor: '0.5'